Nut-lock.



A. SHUSTER.

NUT LOOK.

APPLIOATION FILED MAY 14, 1912.

Patented June 10,1913.

51mm JZerZ c572 2/0656) qXwcueoom v nrrsn smarts ra TENT eerie ALBERTSI-IUSTER, O33 SHAMOKIN, PENNSYLVANIA.

NUT-LOCK.

Application filed May 14, 1912.

To all whom it may concern Be it known that I, ALBERT SHUs'rnR, acitizen of the United States, residing at Shamolrin, in the county ofNorthumberland and State of Pennsylvania, have invented new and usefulImprovements in Nut-Locks, of which the following is a speciiication.

This invention relates to nut locks and has for an object to provide asimple device of this character which when applied to the nut may bemade to effectually engage the bolt so as to hold the former againstretrograde movement thereon.

In the drawing forming a portion of this application, and in which likeletters of reference indicate similar parts in the several views Figurel is a side view of the nut lock. Fig. 2 is an end view thereof. Fig. 3is a section on line 8-8 of Fig. 2. Fig. t is a perspective view of therod. Fig. 5 is a perspective view of the dog.

In the use of the nut lock I employ a bolt- 1 whose thread isinterrupted by the for1'na tion in the shank of the bolt of longitudinalgrooves 2 having radial surfaces or shoulders 3 and beveled surfaces 4.The nut 5 is provided with recesses G which open into the bolt opening 7of the nut. the said grooves having mounted therein for rockingmovements dogs 8. These dogs are identical in construction and each isprovided with a curved outer edge 5) which is mounted to rock. freely onthe corres])ondingly curved all 10 of the recess (3. A. rod of steel. ispassed through the dog and secured therein, the dog being preferablyprovided with. a rectangular bore 11 to receive the correspondinglyformed intermediate portion 12 of the rod, whereby any accidentalrotation of the dog on the stem of the rod is prevented. The oppositeends of the rod are bent at right angles as at 13 and seated in recesses14 in the inner and outer surfaces of the nut. In this manner the dog isfree to rock in the recess 6 with the supporting rod thereof acting as aspring to normally hold Specification of Letters Patent.

Patented June 10,1913.

Serial No. 697,253,

the dog into the bolt opening of the nut. The beveled surfaces a of thegrooves in the shank of the bolt serve to permit the dogs to be rockedagainst the tension of the spring rod as the nut is rotated in onedirection. \Vhen the proper adjustment of the nut is obtained one orboth of the dogs will be made to engage in corresponding grooves of thebolt and to impinge aga'nst the shoulders 3 so as to positively hold thenut against retrograde rotation. The dogs are provided with manipulatingportions 16 that may be engaged by a suitable tool so as to force thedogs to released positions from the bolt.

1. In a nut lock a bolt having a longitudinal groove, a nut adjustableon the bolt and provided with a longitudinal recess therein which opensinto the bolt opening of the nut, a dog mounted for rocking movements inthe recess, a spring having an in termediate portion fixed to the dogand having end portions fixedly secured in the nut whereby the dog isheld under tension and normally extended in the direction of the boltopening in the nut, means for manipulating said dog.

2. In a nut lock a bolt having a longitudinal groove, a nut adjustablymounted on the bolt and provided with a rec a dog mounted for rockingmovements in the groove of the nut and provided with a rectangularpassage, a spring secured to the nut and having a rectangular portionextending through the passage in the (log whereby the latter is normallyheld under tension to effect its automatic projection into th groove ofthe bolt on adjustn'ient of the nut to one position, and means formanipulating said dog.

In testimony whereof I aliiX my signatme in presence of two witnesses.

ALBE t'l. SHUSTEH.

the locking end of \Vitnesses Cunris Byers, Hanvnv lttonoan.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

